More on the Merits of Potter
See Mark Newman's really interesting article entitled C.S. Lewis, Spiritual Warfare, and Harry Potter and the Order of the Phoenix at the Movie Ministry.com website.
(I think the Movie Ministry site looks great. MovieMinistry provides resources, sermon illustrations, Bible studies, "FilmTalk" cards, etc., to assist pastors, youth, and lay leaders in using the power of film to communicate and discuss our relationships with God. Rather than merely providing a forum for censuring films, this Christian site equips Christians to appropriate elements of our culture for our own purposes... in the words of Borat, nice.)
See also Dr. Todd Lewis' rebuttal of the sad and defeatist belief that any mention of witches and wizards in literature and film makes such works automatically unsuitable for Christians – even as allegory: "The Holy Harry Potter Wars,” here.